Forming the heads of carriage-springs



UNITED STATES PATENT OFFICE.

SAML. H. HARTMAN, OF PITTSBURG, PENNSYLVANIA.

FORMING- THE HEADS OF CARRIAGE-SPRINGS.

Specification of Letters`Patent No. 20,268, dated 'May 18, 1858.

To all whom it may concern:

Be it known that I, SAMUEL I-I. HARTMAN, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in the Manner of Making Sockets on the Heads ot Carriage and other Springs; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents a perspective view of the machine by which, the series of operations necessary to form the socket, is effected; and Figs. 2, 3, 4, 5, 6, represent in their order the several changes eiiected in the socket or head, in the course of its construction.

My invention consists in forming a socket (or what is sometimes called a head) upon the heads of carriage springs, by a series of mechanical operations, as will be explained in connection with the accompanying drawings, and the letters of reference thereon.

Fig. l, represents an organized machine for forming the socket, from the blank or blanks: viz: A, is the bed or frame of the machine, upon which is supported a shaft B, carrying ve cams to wit: three large ones C, C', C, and two smaller ones D, D. On the end of this shaft, is a fly or belt wheel E, by which it may be set in motion. On the front of the frame A, are arranged the die or anvil blocks F, F, F, furnished respectively with the proper adjustable and removable dies, to eect the necessary changes of form, in bringing the blank up to the iinished socket, as will be described in connection with the article itself. To lugs a, a, &c., on the die blocks, are hung, by the pivot bolts o, the levers G, G', G, which carry in theirl front ends adjustable and removable counter dies, that work in connection with those in the die blocks F,

lF, F, respectively. There is a yoke or pivoted to the main frame at the points o, o. The front ends of these levers I, I', carry die blocks J, J, to which are connected dies d, (Z, that ellect an important action in the finishing of t-he socket. o, c', are coiled springs, for holding the levers to their cams.

It will be perceived that, the dies in the die or anvil blocks F &c., are composed of three pieces l, 2, 3; and that the counter dies in the levers G, &c., are also formed of three pieces 4, 5, 6. The object of this, and of their adjust-ability, and removability, is that diierent sized sockets may be made on the same machine, by simply removing the middle sections (2, 5), and substituting others for them and then bring the side dies or sections up to the center ones. This adapts the machine to the various sizes of springs to be made.

The operation of forming the socket, in connection with this machine is as follows: Plates of steel are first punched out of the form shown at Fig. 2, with the corners f clipped off, and the two semicircular recesses g, also cut out so that said plate shall fold easily at the line g, g, and when folded, show all its corners cut or rounded oit, thus removing the excess of metal, that would otherwise prevent the ears or lugs of the socket from assuming a circular form. The plates thus cut and bent into a clip z' (as shown at Fig. 3,) are placed on the end of the straight steel bar K, which forms the head or leaf of the spring and by being struck with a hammer will retain that posi tion. It is then heated and put under the action of the die and counter-die, of F, and G, which welds the clips to the bar, and gives them the form shown in Fig. 4. It is then subjected to the dies and counter dies of F, and G', which gives it the form shown at Fig. 5; and finally to the dies, and counter dies, al', d, in the die blocks J J', as well as those in F and G, when they are finished and in the form shown at Fig. 6.

I am aware that, sockets have been wrought on head plates for springs, partly by hand, and partly by machines. I coinplete the entire socket by machine work alone, and by a serie-s of mechanical operations which very much eXpedites the process, and makes a perfect article.

Having thus fully described the nature de blocks F, F, F, and the levers Gr, G, and object of my invention, What I claim VGr, in the order of their sequence substantherein as new, and deslre to secure by Lettially as herein represented and described.

ters Patent isf S. H. HARTMAN. 5 Forming the head or socket, on the head Witnesses:

plate of a spring, by subjecting them to the A. B. STOUGHTON,

action of the dies and counter-dies, in the E. COHEN. 

